Experiments with a new telescopic camera reveal that highly detailed shots of the Earth can be taken from far away in space. Straker then successfully gets funding for a project which will attempt to follow a UFO back to its home planet and transmit back detailed photos of the surface. A space probe is launched and outfitted with the camera in lunar orbit. The next incoming UFO is diverted back home using the Interceptors, and the probe follows it. Several months later, the probe reaches the Alien planet and transmits photos back to SHADO. What do the photographs reveal about the Aliens?